MySQL server error report:Array ( [0] => Array ( [message] => MySQL Query Error ) [1] => Array ( [sql] => select goods_id,goods_name,shop_price,goods_thumb,shop_name,ss.id as ss_id from ydd_goods as g left join ydd_seller_shopinfo as ss on g.seller_id = ss.seller_id where g.cat_id in () order by goods_id desc limit 4 ) [2] => Array ( [error] => You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') order by goods_id desc limit 4' at line 1 ) [3] => Array ( [errno] => 1064 ) )